DISCOVER LITHIUM BLUE DLB-G24-12V Reference manual

CUSTOMER SERVICE BULLETIN
Page 1of 2
Form: 880-0015 Rev A
Lithium BLUE –TROUBLESHOOTING
URGENCY
PRODUCTS CONCERNED
Discover Lithium BLUE Series
POSSIBLE SYMPTOMS
Refer to the latest version of the Manual https://assets.discoverbattery.com/documents/dl_blue/opm-dl-blue-manual.pdf.
Bluetooth will not connect:
Usually this is an issue on the connection device, rarely is there ever an issue with the battery bluetooth module.
Steps to resolve this issue:
•Reset apps on connecting device (sometimes they can be running in background).
•Check that no other devices are connected to the battery, one battery can only connect to one device each time.
•Perform a BMS power reset (remove top cover/BMS, disconnect from battery, reconnect, and reinstall).
Charging issues / over voltage protection fault:
Generic lithium settings of many chargers on the market are too high.
•Many manufacturers have moved to higher charge voltage settings. Discover charge specifications are based in
the interest of cell health and longevity.
a. Over voltage protection is triggered at >3.65V/cell; charger output may fluctuate and trigger protection even at
slightly lower settings.
•Refer to the Manual for protections (section 2.4) and charge settings (section 7.4).
Discharge issues / low voltage protection fault:
•Low voltage protection (2.5V/cell) should not be used as cut-off as it is the last line of defense.
•Set low voltage cut-off at 3.0V/cell.
Storage / dead battery issues:
•Failure to monitor the battery charge status can result in the battery becoming over-discharged and damaging cells
beyond recovery (affecting battery life expectancy and performance or becoming non-functioning).
•Fully charge the batteries prior to storage.
•Battery terminals should be disconnected. Many devices don’t have a physical switch that disconnects power, but
rather shut down electronically. Parasitic power draws accelerate draining the battery.
•Refer to the Manual section 11.
•Batteries that have not been maintained and are left to over discharge need to be removed from service.
BMS Charge/Discharge control circuit damage:
The power electronics on the BMS can be sensitive to excessive ripple (usually a load such as a microwave) and
undersized wires. When either charge/discharge or both circuits are damaged, the battery will not allow either
charge/discharge or both.
•To identify this, the battery will not be in fault or protection mode, but with a load the voltage gradually drops as if
there is a fault when attempt to discharge.
MODEL
PART NUMBER
DLB-G24-12V
900-0046
DLB-G24-24V
900-0047
DLB-G24-36V
900-0048
MODEL
PART NUMBER
DLB-GC12-12V
900-0049
DLB-GC12-24V
900-0050
Battery Voltage
Over Voltage Protection
12V
>14.6V
24V
>29.2V
36V
>43.8V
Battery Voltage
Low Voltage Cut-off
12V
12.0V
24V
24.0V
36V
36.0V
CSB Number
855-0015 Rev A
Date
MAY 15 2023
MEDIUM:
Action by next possible occasion
HIGH:
Action immediately
LOW:
Action if necessary
GENERAL:
General Information

CUSTOMER SERVICE BULLETIN
Page 2of 2
Form: 880-0012 Rev A
•To identify charge circuit damage, the battery terminal voltage jumps up to the charge voltage while the app shows
no current and a much lower voltage, the exact discrepancy depends on the actual block voltage.
•It is normal to have a small discrepancy between terminal and battery voltage shown in app during normal
operations.
SoC is inaccurate:
Lithium batteries have a flat discharge curve making it necessary to estimate SoC based on an algorithm considering
numerous present data points and historical usage factors. Low currents and usage. parasitic draws, may result in an
inaccurate SoC calculation.
•To reset the SoC calibration please refer to CSB 855-0014 Lithium BLUE –SOC Calibration
https://assets.discoverbattery.com/documents/dl_blue/csb-dlb-soc-calibration.pdf.
•Customers with multiple batteries may benefit from using an external SoC gauge (such as Victron).
Positive terminal deformation / melting of cover
Refer to CSB 855-0012 DLB 12V Positive Terminal Overheating
https://assets.discoverbattery.com/documents/dl_blue/csb-dlb-12v-positive-terminal-overheating.pdf.
For other issues or additional support, please submit a support request at:
https://discoverbattery.com/contact/contact-support.
- End of Document -
Reference SoC Voltages
Battery Voltage
0% SoC
20% SoC
80% SoC
100% SoC
12V
12.0V
~12.8V
~13.3V
>=13.6V
24V
24.0V
~25.6V
~26.6V
>=27.2V
36V
36.0V
~38.4V
~39.9V
>=40.8V